2008 Polaris Sportsman 500 EFI/X2/Touring/500 H.O. Service Manual, Page 95Get this manual
ENGINE 3Turn the shaft until balancer counter weights clear the crankshaft and remove the balancer shaft from the crankcase8Support the PTO side crankcase and crankshaft; press the crankshaft outBe careful not to damage the crankcase mating surface or connecting rod
Inspect the balancer drive gear and pump shaft drive gearReplace the shaft if gear teeth are abnormally worn or damagedInspect the balancer shaft bearingsUse feeler gauge to measure the connecting rod big end side clearanceConnecting Rod Big End Side Clearance: Std: .0039-.0256" (.1-.65 mm) Limit: .0315" (.80 mm)